Date: Thu, 31 Jan 2002 14:22:47 -0500 (EST) From: "Storms of Perfection" <gary@outloud.org> To: <replicator@ngs.ru> Cc: <hackers@FreeBSD.ORG> Subject: Re: Clock Granularity (kernel option HZ) Message-ID: <2651.208.141.46.249.1012504967.squirrel@test.outloud.org> In-Reply-To: <web-8711515@intranet.ru> References: <web-8711515@intranet.ru>
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I am intrested in this as well. > Hello! > > I've seen various postings on the Net where people reported > network-related and overall performance improvements caused > by settig HZ kernel option to 1000 (for example), that is, > reducing a tick size to 1ms for their FreeBSD and Linux > systems. However, several problems seem to arise, such as > some device drivers do not include HZ in calculating their > timeout value, but simply assume HZ to be 100, and also some > utility programs such as top or ps take timing information > from the kernel in ticks, also assuming 10ms ticks, however, > most of these saying were related to Linux. How safe it is > to bump up HZ to, say, 1000 in FreeBSD (I use 4.5-STABLE)? > What pitfals will I encounter (drivers, top/ps)? Is there > are going to be [promised] performance increase? Do I > really need it? Thank you. > ____________________________________________________________ > Сделайте себе подарок - http://ngs.ru/tovar > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message Gary Stanley Network Security Engineer PRECISIONet/Webjockey, Inc. (877) 595-8570 Tickle us, do we not laugh? Prick us, do we not bleed? Wrong us, shall we not revenge?" (Merchant of Venice II i 56-63, paraphrase) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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